the THS4032CD's came today from Tirna Electronics. they are just AWESOME.
highly recommend you guys get them. Tirna are excellent to deal with too. royal mail rocks! they shipped it out like 3 days ago from the UK and it already arrived. i wish USPS was that fast.
quick impressions of the 4032's are that they are much more dramatic and brings out the emotion even more so than the stock opamps. absolutely brilliant! it enhances the headphone section quite a bit too. it is really a significant upgrade and well worth the $30 bucks i paid for them. with the 4032's it is no contest between the Oritek v4.2 that i had. from memory the oritek had good emotion but not quite as good and musical as this. update:
so far i've been only listening with the SR325i's driven both from the headphone section of the 7520 and through the gilmore lite via the X1 cables. the sound coming out of the headamp of the 7520 is superb; nice, detailed, clear, punchy, engaging. the sound coming out of the gilmore lite is "out of this world". i am actually hearing layers and it sounds 3D like holographic coming from the Grado's!!
a sense of depth from Grado's; now that's amazing. i'm been listening to both flac and mp3 files via squeezebox and even the mp3's sound incredible. the 4032's seem more lively and punchy. it really keeps my foot tapping and i get a real sense of involvement with the music. it immerses me into the music.